Drive Housing - Graco GM 5000 Instructions And Parts List

WARNING
To reduce the risk of serious injury, including fluid in-
jection always follow the Pressure Relief Procedure
Warning on page 14 before checking, adjusting,
cleaning or shutting off the sprayer. Disconnect the
spark plug!
NOTE: Refer to Fig. 7 for this procedure.
1. Remove the front cover and screws (23,68).
2. Disconnect the pump outlet hose from the displace-
ment pump nipple. For the upright carts only, remove
the spring clips (112, 114) and the drain hose (113)
from the pump.
3. Remove the four screws (73) and lockwashers (74)
from the bearing housing (20).
4. Lightly tap the back of the bearing housing (21) with
a plastic mallet. Pull the pump, bearing housing and
connecting rod away from the drive housing as one
assembly.
5. Remove the two screws (24) and lockwashers (11).
Remove the four screws (10) and lockwashers (11).
6. Lightly tap around the drive housing (20) to loosen
the drive housing. Pull the drive housing straight off
the pinion housing. Be prepared to support the gear
cluster (18), which may also come out.
74
73
23
68
Fig. 7

Drive Housing

20
11
24
21
DO NOT drop the gear cluster (18) when removing
the drive housing (20). The gear cluster is easily dam-
aged. The gear may stay engaged in the drive hous-
ing or pinion housing.
DO NOT lose the thrust balls (20c or 19d) located at
each end of the gear cluster, or allow them to fall be-
tween the gears. The ball, which is heavily covered
with grease, usually stays in the shaft recesses, but
could be dislodged. If the balls are caught between
the gears and not removed, they will seriously dam-
age the drive housing. If the balls are not in place, the
bearings will wear prematurely.
7. Liberally apply bearing grease to the gear cluster
(18). A tube of grease is supplied with each replace-
ment gear cluster. Use a full 6 oz. (160 grams) of
grease. Be sure the thrust balls (20c and 19d) are in
place.
8. Place the bronze colored washer (20a) and then the
silver–colored washer (20b) on the shaft protruding
from the big bearing of the drive housing (20). Align
the gears and push the new drive housing straight
onto the pinion housing and locating pins (B).
9. Starting at Step 4, work backwards to reassemble
the sprayer. Or, move ahead to the next section in
this manual if further service is needed.
B
19
20b
20a
20c
112
113
114
CAUTION
10
11
10
11
19d
18
0170